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Watanabe vs Buss, moves 15-17

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Jonathan Buss

unread,
May 25, 1990, 3:24:22 PM5/25/90
to
I response to a suggestion from a spectator, I have labelled the new
moves a, b, c. Email me if you have an opinion on which convention is
better.

Jonathan

White: Larry Watanabe, wata...@cs.uiuc.edu
Black: Jonathan Buss, jfb...@maytag.uwaterloo.ca

komi: 5 1/2
Play started May 15, 1990

A B C D E F G H J K L M N O P Q R S T X O X O X O
19 . . . . . . . . . . . . . . . . . . . 19 1 Q16 D4 51 ___ ___ 101 ___ ___
18 . . . . X a . . . . . . . . . . . . . 18 3 Q3 D17 53 ___ ___ 103 ___ ___
17 . . O O X O . . . . . . . . . . . . . 17 5 R9 K4 55 ___ ___ 105 ___ ___
16 . c . X O . . . . + . . . . . X . . . 16 7 D15 D11 57 ___ ___ 107 ___ ___
15 . . . X b . . . . . . . . . . . . . . 15 9 E17 E16 59 ___ ___ 109 ___ ___
14 . . . . . . . . . . . . . . . . . . . 14 11 D16 F17 61 ___ ___ 111 ___ ___
13 . . . . . . . . . . . . . . . . . . . 13 13 E18 C17 63 ___ ___ 113 ___ ___
12 . . . . . . . . . . . . . . . . . . . 12 15 F18 E15 65 ___ ___ 115 ___ ___
11 . . . O . . . . . . . . . . . . . . . 11 17 B16 ___ 67 ___ ___ 117 ___ ___
10 . . . + . . . . . + . . . . . + . . . 10 19 ___ ___ 69 ___ ___ 119 ___ ___
9 . . . . . . . . . . . . . . . . X . . 9 21 ___ ___ 71 ___ ___ 121 ___ ___
8 . . . . . . . . . . . . . . . . . . . 8 23 ___ ___ 73 ___ ___ 123 ___ ___
7 . . . . . . . . . . . . . . . . . . . 7 25 ___ ___ 75 ___ ___ 125 ___ ___
6 . . . . . . . . . . . . . . . . . . . 6 27 ___ ___ 77 ___ ___ 127 ___ ___
5 . . . . . . . . . . . . . . . . . . . 5 29 ___ ___ 79 ___ ___ 129 ___ ___
4 . . . O . . . . . O . . . . . + . . . 4 31 ___ ___ 81 ___ ___ 131 ___ ___
3 . . . . . . . . . . . . . . . X . . . 3 33 ___ ___ 83 ___ ___ 133 ___ ___
2 . . . . . . . . . . . . . . . . . . . 2 35 ___ ___ 85 ___ ___ 135 ___ ___
1 . . . . . . . . . . . . . . . . . . . 1 37 ___ ___ 87 ___ ___ 137 ___ ___
A B C D E F G H J K L M N O P Q R S T 39 ___ ___ 89 ___ ___ 139 ___ ___
41 ___ ___ 91 ___ ___ 141 ___ ___
Player O has captured: 0 43 ___ ___ 93 ___ ___ 143 ___ ___
Player X has captured: 0 45 ___ ___ 95 ___ ___ 145 ___ ___
47 ___ ___ 97 ___ ___ 147 ___ ___
49 ___ ___ 99 ___ ___ 149 ___ ___

Comments:

(15) (J) Black strengthens his weaker stones. In situations like
this, beginners often make the mistake of giving an atari, which
strengthens only the opponent. If Black plays E15, White is happy to
connect at F16, all but capturing the two black stones above. (Black
could consider this a sacrifice, but he gets very little compensation
for his loss.) If BF16, then WE15 takes a vital Black liberty on the
left. The following play is complicated, but I found no way for Black
to save his stones.

(White 12 at F17 looks like the same kind of beginner mistake, but it
is actually White's best play in that position. The corner stones are
much weakened by BE18, but they are strong enough to be effectively
sacrificed. If "beginner mistakes" were always bad, the game of go
would be much less interesting.)

(16) Starting a fight against the stones on the left by
pushing against them.

(17) Again defending the weaker stones.

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